I have a an Android resource drawable that I want to use in a BitmapShader call to a paint object.

I keep getting problems in trying to convert this android drawable to bitmap.

I have tried:

Drawable theBackground =   ContextCompat.getDrawable(FullscreenActivity.wkContextRef.get(),R.drawable.grid_background);
      Bitmap backDraw = ((BitmapDrawable)theBackground).getBitmap();

Then, it says that I can not convert GradientDrawable to BitmapDrawable!

I have also tried:

Bitmap bii = BitmapFactory.decodeResource(FullscreenActivity.wkContextRef.get().getResources(),R.drawable.grid_background);

Then, when I set the BitmapShader on the paint it says the Bitmap must be non-null.

This is how I define my paint object and how I set the shader on the paint object:

Paint pintura=new Paint();
    pintura.setStyle(Paint.Style.FILL_AND_STROKE);

    pintura.setPathEffect(new ComposePathEffect(
            new CornerPathEffect(100f) , new DiscretePathEffect(15f,55f)
    ));

    pintura.setShader(new BitmapShader(bii,
            Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));

How can I use this resource drawable in the BitmapShader call?

I have tried converting the resource drawable to a bitmap by using BitmapFactory.decodeResource() AND
creating a Drawable with ContextCompat.getDrawable() and then converting that drawable to BitmapDrawable to use the method getBitmap().